...
Building a Walter Tortoise
Drive and Steering Motors
Modifying the HS-425BB Servomotor
Sheet Metal Fabrication
Shell
Finding the Center of Gravity
Attaching Bumper to Robot Base
Bumper ... easy to embed
into larger electronic circuit designs. Their ability to store and run unique pro-
grams makes them extremely versatile. For instance, one can program a
microcontroller to make ... Your right to use the work may
be terminated if you fail to comply with these terms.
THE WORK IS PROVIDED “AS IS.” McGRAW-HILL AND ITS LICENSORS MAKE
NO GUARANTEES OR WARRANTIES AS TOTHE ACCURACY,...
... directory regardless of how
deep (levels) one has moved into subdirectories
.
The root directory is the top of
the directory hierarchy. From the Windows subdirectory type in
cd\ and hit
the Enter ... window on the left.
Insert the 16F84 into the socket on the programming board, and select the
Program option from the Run menu. An alternative to using the menu option
is to press the Ctrl ... to select all the files as before,
copy the files, drag the selected files tothe PBC directory using the mouse, and
then release the mouse button (see Fig. 2.7).
Installing the PicBasic Pro...
... subdirec-
tory on the hard drive and click on OK.
The “Default Source Code Directory”
text field now contains the path
“C:\Applics” subdirectory (see Fig. 4.6). Click the OK button to close the ... the Edit program.
In DOS we will work from and
store our program(s) in the subdirectory we created earlier, called Applics.
Move into the Applics subdirectory
. Use the
cd (c
hange directory) ... to control the LPT port so the
EPIC programming software will work. Select the MS-DOS Prompt and hit
the OK button.
EPIC’s opening screen is shown in Fig. 5.12. Use the mouse to click on the...
... lead of the
1
4
-W resistor into
a socket in bank 2. Take the positive lead of the LED and plug it into a socket
in the same column as the one containing the resistor lead.
Connect the oppo-
site ... the LED, and plug it into one of the ground sockets at the bottom.
Plug the programmed 16F84 microcontroller into the 18-pin socket on the
PIC Experimenter’s board, and turn on the power. The ... shown in the legend of Fig. 6.17. On the schematic the
LED appears as a diode. To wire this circuit, connect one lead of the
1
4
-W resis-
tor into one of the RB1 sockets. Connect the other lead...
... cleaner. The purpose of the robot is to vacuum the floor of a customer’s
home or apartment. Your job is to program the navigation system. The robot
needs to move autonomously throughout the house
. ... is used, the commands are a little
different. For the PicBasic compiler, the command to write to a register is the
poke command. The program line to write the decimal value 1 into the TRISB ... variable width pulse. The pulse can be varied
from 1 to 2 ms. The width of the pulse controls the position of the servomotor
shaft.
A 1-ms pulse rotates the shaft tothe extreme counterclockwise...
... cause the servo-
motor to turn in the opposite direction.
There are two ways we can stop the servomotor from rotating. The first
method is to simply stop sending pulses tothe servomotor
.
The ... remove the four back screws that hold the servomotor together (see
Fig. 8-4). Keep the servomotor horn attached tothe front of the servomotor.
Once the screws are removed, gently pull off the ...
the ends of the upper bracket. Then secure the upper bracket tothe bumper
using 5-40 machine screws and nuts.
Attaching Bumper to Robot Base
The bumper is attac
hed tothe robot body by the...
... addition, it’s a useful time
for the moderator to discuss the test with the observers. When leaving the room,
the moderator should reemphasize the need for the evaluator to narrate all of
his or her ... front door, they
were asked to scroll down through one of the top stories, talking about their
experience with the interface and their thoughts on the content. They were then
asked to look for ... experience, the developers paid special attention tothe sliding panel.
In the fi rst round of testing, none of the six evaluators opened the panel.
When asked whether they had seen the bar and the...
... to ask them
any questions about their background. Because the inspectors fi ll in the defect
reports immediately, there is usually no need to record the session – there is lit-
tle insight to ... Table 12.5 to record the applicability). The next column is for recording the
adherence/nonadherence of the interface feature tothe particular guideline of
the standard. The inspector records ... comments on them.
Some practitioners prefer to gather the defects and the good points about the
interface on a single form, whereas others prefer to deal with all the defects and all
the good...
... Table 12.5 to record the applicability). The next column is for recording the
adherence/nonadherence of the interface feature tothe particular guideline of
the standard. The inspector records ... http://zing.ncsl.nist.gov/iusr/documents/whatistheCIF.html )
If your task is to improve the interface as well as to establish whether it meets the
requirements, then you are likely to need to work out what to do next: recom-
mending the ... that the results of heuristic evaluations
and other types of inspections look at the impact ratio, which is the ratio of the number of
problems that the product team commits to fi x tothe total...
...
12
All too many consumers are aware of this and use it to their advantage. The strategy
is simply to order an item on the Internet then contest the charge or ask the
merchant to issue a refund. The ... deposit to protect themselves in the event that the merchant
is unable to cover the chargeback costs at the time they occur. Merchants who incur
too many chargebacks are at risk of losing their ... readily, there is little to stop a consumer from purchasing your
product with a credit card, asking for a refund or chargeback, then
distributing the file to other people. Some sell it to others...